CAT 20R-9721 DIESEL INJECTOR CAT

The CAT 20R-9721 is a Caterpillar remanufactured fuel injector. Cat Reman fuel injectors are designed to deliver the correct amount of fuel at the correct time into an internal combustion engine, supporting reliable combustion and engine performance when installed in the proper Cat engine application.

Specifications

• Manufacturer: Caterpillar / CAT
• Part Number: 20R-9721
• Part Type: Cat Reman fuel injector
• System: Diesel fuel injection system
• Function: Meters and delivers fuel into the engine combustion process
• Condition Category: Cat Reman component
• Application Requirement: Verify by engine serial number and parts manual

Key Features

• Cat Reman injector for compatible Caterpillar diesel engines.
• Supports proper fuel delivery timing and quantity.
• Useful replacement part for worn, leaking, or failed injectors.
• Designed for heavy-duty engine repair and rebuild work.

Cross References

• Primary CAT part number: 20R-9721.
• Cat related listings show it in injector group contexts; confirm any alternate or replacement number before ordering.

Machine Compatibility

• Compatibility depends on engine model, serial number, fuel system type, and emissions configuration.
• Confirm fitment and calibration requirements through Cat documentation.

Engine Platforms

• Used in compatible Caterpillar diesel engine platforms where 20R-9721 is specified.
• Do not mix injector part numbers unless Cat documentation confirms interchange.

Typical Applications

• Diesel injector replacement.
• Engine fuel system service.
• Overhaul and rebuild projects.
• Caterpillar reman injector inventory.

Search Keywords

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Caterpillar fuel injector, diesel engine fuel system part, heavy equipment injector replacement, HRS Supplies.